US4334663A - Molds for the production of dishes and the like from powdered ceramic materials - Google Patents

Molds for the production of dishes and the like from powdered ceramic materials Download PDF

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Publication number
US4334663A
US4334663A US06/209,290 US20929080A US4334663A US 4334663 A US4334663 A US 4334663A US 20929080 A US20929080 A US 20929080A US 4334663 A US4334663 A US 4334663A
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United States
Prior art keywords
box
die
cavity
dies
mold
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Expired - Lifetime
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US06/209,290
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English (en)
Inventor
Franco Ponginibbio
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Welko Industriale SpA
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Welko Industriale SpA
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Assigned to WELKO INDUSTRIALE S.P.A. reassignment WELKO INDUSTRIALE S.P.A. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PONGINIBBIO FRANCO
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/025—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space whereby the material is transferred into the press chamber by relative movement between a ram and the press chamber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form

Definitions

  • molds for the production of ceramic dishes on horizontal presses are known and are composed by two coaxial cylindrical dies, having equal diameter, respectively constituting a die and a counter-die, at least one of which being axially disposable with respect to the other said dies include end walls facing each other and reproducing, in negative, respectively the front and the rear conformation of the dish to be molded.
  • Said cylindrical coaxial dies are surrounded by a movable die-box, that hereinafter will be called a main die-box having a cylindrical cavity the diameter of which is a bit greater than the diameters of the cylindrical dies.
  • Said main die-box is provided with a passing vertical inner duct communicating with a hopper, from which the powdered ceramic material to be pressed is fed into a cavity defined by a predetermined spacement of the end walls of the cylindrical die and the counter-die.
  • the cylindrical inner wall of the die-box has the function to peripherally delimit the cavity to be fed with the powdered material and to define the peripheral edge of the molded dishes.
  • the cylindrical wall of the main die-box must necessarily have a diameter greater than the cylindrical coaxial dies, to be able to run along the latter, the pieces obtained by the employment of the mold show the peripheral edge flattened and provided with several flashes, so that the molded pieces must be machined to spud off and to round the peripheral edge by means of suitable grinding machines, with time consuming and expensive operations.
  • the mold of present invention has the aim to avoid the above discussed disadvantages and is characterized in that an auxiliary die-box is provided encircling and slidable at least on a cylindrical die, and displaceable with respect to the main die-box, to be spaced from the latter or approached to it on the facing lateral walls of the main die-box and of the auxiliary die-box, annular grooves are provided which are open toward the encircled cylindrical dies and and conformed such in a way that in the contacting condition of the main and auxiliary die-boxes they perform an annular cavity that may be registered in correspondence with the periphery of the cavity of the mold, radially prolonging the latter and forming the peripheral border of the dish to be produced.
  • FIGS. 1 and 2 show a longitudinal section of a mold for the production of ceramic dishes according to the known art, respectively in the feeding condition and in the pressing condition;
  • FIG. 3 shows in a more enlarged scale and in a longitudinal section a mold for producing ceramic dishes, according to the present invention, in the resting or inoperative position;
  • FIG. 4 shows the same mold wherein the cylindrical dies are spaced for limiting the filling cavity
  • FIG. 5 shows the same mold in the pressing condition
  • FIGS. 6 to 11 show, in a reduced scale, the successive conditions of the mold when performing the pressing cycle of the ceramic dish.
  • FIGS. 1 and 2 a mold for the production of ceramic dishes has been depicted, as embodied according to the known art.
  • Said mold comprises a die 1, a counter-die 2 and a main die-box 3.
  • the die and the counter-die are both cylindrical and having circular sections with the same diameter and are coaxial; the opposite end walls of dies 1 and 2 are shaped as to reproduce, in negative, respectively the front and the rear conformation of the dish to be pressed.
  • main die-box 3 designed to truncate the peripheral edge of the dish and provided with a cylindrical cavity surrounding the dies 1 and 2 and having a diameter a bit greater than the diameter of said dies.
  • a vertical conduit 4 is provided to feed the powdered ceramic material in the cavity generated between the opposed walls of the cylindrical dies, suitably spaced from each other.
  • the powdered ceramic material is discharged from a hopper, not represented, after the displacement of the main die-box from the position 3' indicated in dotted lines to the position indicated in full fines.
  • FIG. 2 the same mold is represented in the condition of the pressing step, after displacement of the main die-box 3 in a position that peripherially closes the cavity of the mold.
  • the produced dish is provided with the peripheral edge simply truncated and flattened and usually accompanied with many flashes that must be eliminated by means of elaborate grinding and finishing operations.
  • FIG. 3 it is represented a mold according to the present invention in the resting or inoperative condition.
  • Said mold is composed by a cylindrical die 10, and a cylindrical counter-die 11, both having equal diameter and being coaxial with each other.
  • the opposed walls 12 and 13 of the dies are shaped as to reproduce, in negative, the front and rear conformation of the dishes to be pressed, except for a peripheral border of the dishes to be produced.
  • a main die-box 14 is slidably disposed along said cylindrical dies, said main die-box 14 being provided with a vertical conduit 15 that upwardly communicates with a hopper (not shown) and is downwardly open upon the cylindrical dies 11 and 12 for the purposes that will be described hereinafter.
  • a hopper not shown
  • annular grooves 20 and 21 are provided, shaped in such a way that, when the facing walls are brought into contact, they reproduce the negative shape of the peripheral border of the dishes to be produced and may constitute a radial prolongment of the cavity of the mold.
  • the mold is disposed as shown in FIG. 5, wherein the auxiliary die-box 16 is displaced according to the arrow 18 up to get in contact with the main die-box 14 and then both dies are displaced so that the annular cavity formed by the grooves 20 and 21 is registered in correspondence with the cavity formed by the cylindrical dies 10 and 11.
  • the cylindrical die 11 is displaced in the pressing position, so that the powdered ceramic material is pressed and expanded to fill said annular cavity as clearly depicted in FIG. 5, forming the dish and its peripheral border, suitably rounded.
  • FIGS. 6 to 11 there are represented the successive steps of a pressing cycle of the mold.
  • FIG. 6 shows the mold in the resting or inoperative position, wherein the cylindrical dies 10 and 11 are appreciably spaced one with respect to the other.
  • FIG. 7 shows the mold wherein the cylindrical die 11 is approached to the cylindrical die 10, to define the filling cavity of the mold.
  • FIG. 8 shows the successive step wherein the main die-box 14 is displaced to locate the conduit 15 in correspondence with said filling cavity, so that the powdered ceramic material is fed into the mold.
  • FIG. 9 shows the successive step wherein the main die-box 14 and the auxiliary die-box 16 come into contact and are both displaced to register the annular cavity in correspondence with the cavity filled with the material.
  • FIG. 10 shows the pressing step corresponding to FIG. 5.
  • FIG. 11 discloses the last step wherein the cylindrical die 11 is retracted in the position of FIG. 6 as well as the auxiliary die-box 16, so that the pressed dish is allowed to drop out of the mold by gravity.
  • grooves 20 and 21 are directly provided respectively on the bodies of the main die-box 14 and of the auxiliary die-box 16.
  • said grooves 20 and 21 may be provided on respective separated annular members designed to be mounted and fixed, for instance by screws, to the bodies of the die-box 14 and the auxiliary die-box 16.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
  • Powder Metallurgy (AREA)
US06/209,290 1979-12-07 1980-11-21 Molds for the production of dishes and the like from powdered ceramic materials Expired - Lifetime US4334663A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT27939A/79 1979-12-07
IT27939/79A IT1126525B (it) 1979-12-07 1979-12-07 Perfezionamenti agli stampi per presse destinate alla fabbricazione di piatti,o simili,di materiale ceramico

Publications (1)

Publication Number Publication Date
US4334663A true US4334663A (en) 1982-06-15

Family

ID=11222633

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/209,290 Expired - Lifetime US4334663A (en) 1979-12-07 1980-11-21 Molds for the production of dishes and the like from powdered ceramic materials

Country Status (7)

Country Link
US (1) US4334663A (enrdf_load_stackoverflow)
JP (1) JPS5682204A (enrdf_load_stackoverflow)
BR (1) BR8007783A (enrdf_load_stackoverflow)
DE (1) DE3045989C2 (enrdf_load_stackoverflow)
FR (1) FR2471263A1 (enrdf_load_stackoverflow)
GB (1) GB2065021B (enrdf_load_stackoverflow)
IT (1) IT1126525B (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4544345A (en) * 1981-11-10 1985-10-01 Eugen Buhler Device for the production of molded articles from a pourable substance
US4719070A (en) * 1984-07-10 1988-01-12 Hutschenreuther Ag Process and molding press for producing flat moldings
US5213821A (en) * 1988-11-05 1993-05-25 Werzalit Ag & Co. Apparatus for manufacturing an elongate cover profile

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59120407A (ja) * 1982-12-28 1984-07-12 株式会社イナックス タイル素地の乾式加圧成形方法

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1575688A (en) * 1920-12-13 1926-03-09 Joannides Christe Manufacture of dental plates and apparatus therefor
US1868425A (en) * 1928-05-05 1932-07-19 William J Miller Method of and apparatus for manufacturing pottery ware
US2422809A (en) * 1942-12-09 1947-06-24 Stupakoff Ceramic & Mfg Co Method of molding ceramic articles
US2446872A (en) * 1941-12-04 1948-08-10 Gen Motors Corp Method of molding ceramic articles
US2615229A (en) * 1948-11-12 1952-10-28 Ram Inc Mold and method of making molds
US2627641A (en) * 1949-07-14 1953-02-10 Ram Inc Multiple gutter mold
US3579739A (en) * 1966-05-25 1971-05-25 Ptt Uk Apparatus for forming moulding components

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT992997B (it) * 1973-08-17 1975-09-30 Bettonica L Pressa idraulica per la fabbrica zione di piastrelle e piatti di materiale ceramico e simili
IT1091882B (it) * 1978-01-12 1985-07-06 Bettonica Luigi Perfezionamenti alle presse idrauliche

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1575688A (en) * 1920-12-13 1926-03-09 Joannides Christe Manufacture of dental plates and apparatus therefor
US1868425A (en) * 1928-05-05 1932-07-19 William J Miller Method of and apparatus for manufacturing pottery ware
US2446872A (en) * 1941-12-04 1948-08-10 Gen Motors Corp Method of molding ceramic articles
US2422809A (en) * 1942-12-09 1947-06-24 Stupakoff Ceramic & Mfg Co Method of molding ceramic articles
US2615229A (en) * 1948-11-12 1952-10-28 Ram Inc Mold and method of making molds
US2627641A (en) * 1949-07-14 1953-02-10 Ram Inc Multiple gutter mold
US3579739A (en) * 1966-05-25 1971-05-25 Ptt Uk Apparatus for forming moulding components

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4544345A (en) * 1981-11-10 1985-10-01 Eugen Buhler Device for the production of molded articles from a pourable substance
US4719070A (en) * 1984-07-10 1988-01-12 Hutschenreuther Ag Process and molding press for producing flat moldings
US5213821A (en) * 1988-11-05 1993-05-25 Werzalit Ag & Co. Apparatus for manufacturing an elongate cover profile

Also Published As

Publication number Publication date
FR2471263B1 (enrdf_load_stackoverflow) 1984-04-20
IT1126525B (it) 1986-05-21
IT7927939A0 (it) 1979-12-07
JPS5682204A (en) 1981-07-04
GB2065021B (en) 1983-05-18
FR2471263A1 (fr) 1981-06-19
GB2065021A (en) 1981-06-24
JPS6325922B2 (enrdf_load_stackoverflow) 1988-05-27
BR8007783A (pt) 1981-06-16
DE3045989C2 (de) 1985-02-14
DE3045989A1 (de) 1981-09-03

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AS Assignment

Owner name: WELKO INDUSTRIALE S.P.A., PIAZZA VALASCA 5, 20122

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PONGINIBBIO FRANCO;REEL/FRAME:003839/0779

Effective date: 19801121

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